/*
    Copyright 2006 Andrew Wilkinson <andrew@indiegigs.co.uk>

    This file is part of GL2x.

    GL2x is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    GL2x is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with GL2x; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

#include "displaylists.h"

DisplayList* dlist_map[255];

void GL2x_initDisplayLists() {
    int i;
    for(i=255; i >= 0; i--) {
        dlist_map[i] = NULL;
    }
}

unsigned int GL2x_genDisplayLists(int size) {
    int start;
    int end;
    for(start=0; start<255-size; start++) {
        end=start;
        while(dlist_map[end] == NULL && (end - start) < size) {
            end++;
        }
        if(dlist_map[end] == NULL) {
            for(end=start; end<start+size; end++) {
                dlist_map[end] = malloc(sizeof(DisplayList));
                if(dlist_map[end] == NULL) {
                    break;
                }
            }
            if(end >= start+size) {
                return start;
            } else {
                for(end=start; end<start+size; end++) {
                    free(dlist_map[end]);
                }
                return 0;
            }
        }
    }
    return 0;
}
